33 CFR 155.775: Maximum cargo level of oil in tanks

Last reviewed: October 14, 2026

This section limits how full a tank vessel's cargo tank may be filled with oil. The tank may not be filled higher than 98.5 percent of the cargo tank volume or the level at which the overfill alarm is set. The meaning of "oil" comes from § 151.05 of this chapter.

Applies toCargo tanks on tank vessels that are filled with oil.

What it says

  1. For this section, "oil" has the same meaning as provided in § 151.05 of this chapter.

    33 CFR 155.775(a)““oil” has the same meaning as provided in § 151.05 of this chapter.”

  2. A cargo tank on a tank vessel may not be filled with oil higher than 98.5 percent of the cargo tank volume.

    33 CFR 155.775(b)“A cargo tank on a tank vessel may not be filled with oil higher than—”

  3. A cargo tank on a tank vessel also may not be filled with oil higher than the level at which the overfill alarm required by § 155.480 is set.

    33 CFR 155.775(b)(2)“The level at which the overfill alarm required by § 155.480 is set.”

Common questions

What is the maximum fill level for a cargo tank on a tank vessel?

A cargo tank may not be filled with oil higher than 98.5 percent of the cargo tank volume, or the level at which the overfill alarm is set.

“98.5 percent of the cargo tank volume; or”

Which overfill alarm does the cargo level limit refer to?

It refers to the overfill alarm required by § 155.480.

“The level at which the overfill alarm required by § 155.480 is set.”

What does "oil" mean in 33 CFR 155.775?

"Oil" has the same meaning as provided in § 151.05 of this chapter.

““oil” has the same meaning as provided in § 151.05 of this chapter.”

The text of 33 CFR 155.775

Electronic Code of Federal Regulations (eCFR), current as of April 16, 2026 · Read it on eCFR

Maximum cargo level of oil

(a) For the purposes of this section, “oil” has the same meaning as provided in § 151.05 of this chapter.

(b) A cargo tank on a tank vessel may not be filled with oil higher than—

(1) 98.5 percent of the cargo tank volume; or

(2) The level at which the overfill alarm required by § 155.480 is set.

Sections it refers to

The plain-English explanation on this page was written with AI from the regulation text above and checked automatically before publishing: every quote appears in the text, every number comes from it, and a second model confirmed each statement adds nothing the text doesn't say. Regulation text current as of April 16, 2026. The regulation text governs. RegKnot is not affiliated with the U.S. Coast Guard.